package timeflow.vis.timeline;

import java.awt.*;
import java.util.*;

import timeflow.data.time.Interval;
import timeflow.data.time.TimeUtils;
import timeflow.model.*;
import timeflow.vis.Mouseover;
import timeflow.vis.TimeScale;

public class AxisRenderer
{
        TimelineVisuals visuals;

        public AxisRenderer(TimelineVisuals visuals)
        {
                this.visuals = visuals;
        }

        public void render(Graphics2D g, Collection<Mouseover> objectLocations)
        {
                TFModel model = visuals.getModel();
                g.setColor(model.getDisplay().getColor("chart.background"));
                Rectangle bounds = visuals.getBounds();

                TimeScale scale = visuals.getTimeScale();
                java.util.List<AxisTicMarks> t = AxisTicMarks.allRelevant(scale.getInterval());

                int dateLabelH = model.getDisplay().getInt("timeline.datelabel.height");
                int y = bounds.y + bounds.height - dateLabelH;

                // draw in reverse order so bigger granularity at top.
                int n = t.size();
                for (int i = 0; i < n; i++)
                {
                        render(t.get(i), g, bounds.x, y, dateLabelH - 1, bounds.y, i == 0, objectLocations);
                        y -= dateLabelH;
                }
        }

        void render(AxisTicMarks t, Graphics2D g, int x, int y, int h, int top, boolean full, Collection<Mouseover> objectLocations)
        {
                TFModel model = visuals.getModel();

                int n = t.tics.size();
                for (int i = 0; i < n - 1; i++)
                {
                        long start = t.tics.get(i);
                        long end = t.tics.get(i + 1);

                        int x0 = Math.max(x, visuals.getTimeScale().toInt(start));
                        int x1 = visuals.getTimeScale().toInt(end);

                        int dayOfWeek = TimeUtils.cal(start).get(Calendar.DAY_OF_WEEK);

                        g.setColor(t.unit.isDayOrLess() && (dayOfWeek == 1 || dayOfWeek == 7)
                                ? new Color(245, 245, 245) : new Color(240, 240, 240));

                        g.fillRect(x0, y, x1 - x0 - 1, h);
                        g.setColor(Color.white);
                        g.drawLine(x1 - 1, y, x1 - 1, y + h);
                        g.drawLine(x0, y + h, x1, y + h);
                        objectLocations.add(new Mouseover(new Interval(start, end), x0, y, x1 - x0 - 1, h));

                        g.setFont(model.getDisplay().timeLabel());
                        String label = full ? t.unit.formatFull(start) : t.unit.format(new Date(start));
                        int tx = x0 + 3;
                        int ty = y + h - 5;
                        g.setColor(full ? Color.darkGray : Color.gray);
                        int sw = model.getDisplay().timeLabelFontMetrics().stringWidth(label);
                        if (sw < x1 - tx - 3)
                        {
                                g.drawString(label, tx, ty);
                        } else
                        {
                                int c = label.indexOf(':');
                                if (c > 0)
                                {
                                        label = label.substring(0, c);
                                        sw = model.getDisplay().timeLabelFontMetrics().stringWidth(label);
                                        if (sw < x1 - tx - 3)
                                        {
                                                g.drawString(label, tx, ty);
                                        }
                                }
                        }
                }
        }
}